Re: Deprecation of the formats DATE_ISO8601 and DATE_RFC7231

>outdated format, standard has been changed while ago What do you mean? Do you mean that the constant was legal at some point? Was there ever a version of ISO8601 allowing the mixing of "extended format" and "basic format" ? The earliest version I've read, iso8604:2004, does not allow it (more on that here: https://externals.io/email/114883/source - can't find the proper link right now, am on phone). Haven't read the older 1988/1999/2000 versions, and it's possible one of those allowed it, but I doubt it. The only thing I can say for sure is that it's been illegal since the 2004 version On Fri, May 19, 2023, 23:17 Jorg Sowa <jorg.sowa@gmail.com> wrote: > > How common is it in the wild? I am pretty sure I've used it myself > without really thinking many times, which I suspect is common. Knowing how > much code would be impacted would determine how we'd go about deprecating > it and on what timeline. > > I'm not sure how would be possible to find out. I suppose most of the > frameworks (and thus popular PHP libraries) avoid this constant as showed > in Drupal and Carbon. The scanning of popular libraries will not show the > scale of the problem (however I will do it tomorrow) Helpful fact is that > those constants are just constants so it's easily replaceable with > strings 'Y-m-d\\TH:i:sO' > and 'D, d M Y H:i:s \\G\\M\\T'. >